Figure F2. Histograms used during Leg 118 to show occurrences of gabbro and serpentinized peridotite in dredge hauls in the Indian Ocean. A. Number of dredge hauls in the Indian Ocean recovering plutonic associations (G = gabbro, P = serpentinized peridotite, G + P = both), compiled from published sources as of 1987. The compilation is for all dredge locations. B. Histogram showing number of dredge hauls with some peridotite from transverse ridges only, plotted vs. depth below transverse-ridge summits. The arrow gives the total penetration of Hole 735B through Leg 176, 1508 m, in gabbro, with peridotite (dashed line) somewhere deeper than that.

Figure F2. Histograms used during Leg 118 to show occurrences of gabbro and serpentinized peridotite in dredge hauls in the Indian Ocean. A. Number of dredge hauls in the Indian Ocean recovering plutonic associations (G = gabbro, P = serpentinized peridotite, G + P = both), compiled from published sources as of 1987. The compilation is for all dredge locations. B. Histogram showing number of dredge hauls with some peridotite from transverse ridges only, plotted vs. depth below transverse-ridge summits. The arrow gives the total penetration of Hole 735B through Leg 176, 1508 m, in gabbro, with peridotite (dashed line) somewhere deeper than that.